Literary usage of Altezzas

Below you will find example usage of this term as found in modern and/or classical literature:

1.Remains, Historical and Literary, Connected with the Palatine Counties of by Chetham Society (1851)"Peter Philipps, "our rare countryman, organist to their altezzas at Brussells,
now one of the greatest masters of musick in Europe," (l) dedicated to Sir ..."

2.Cardinal Allen's Defence of Sir William Stanley's Surrender of Deventer by William Allen, Roger Ashton (1851)"Peter Philipps, "our rare countryman, organist to their altezzas at Brussells,
now one of the greatest masters of musick in Europe," (') dedicated to Sir ..."